Features Patented technology Pure-sinusoidal precise current control technology High performance, low cost Supply voltage up to +90VDC Peak current to 8.2A (RMS5.86A) Optically isolated differential input pulse frequency up to 300 KHz Automatic idle-current reduction Suitable for 2-phase and 4-phase stepper motors 16 selectable resolutions up to 10000 steps/rev DIP switch current setting with 8 different values PUL/DIR & CW/CCW mode optional Short-circuit, over-voltage,short-voltage protection Small size (115x67.7x25mm) Introduction SD9082 is a high performance microstepping driver using pure-sinusoidal wave current control technology. It is particularly suitable for applications desired with extremely low noise and low heating. Currently most of the microstepping drivers in the market apply pseudo-sinusoidal current control technology, which makes the output current to be a distorted sine wave, or makes much current ripple, both cause the motor higher noise and bigger vibration, furthermore cause serious motor heating, so when the motor works long time, the torque decrease, motor aging and the use life shorted. However the pure-sinusoidal precise current control technology (domestic patented technology) applied by MD882 can improve above problems very well, and the operating effect of the stepping motor is somehow inclined to that of servo motor. Applications Suitable for a wide range of stepping motors of Nema 17, 23 and 34, and usable for various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, and pick-place devices. Particularly useful in applications with low vibration, high speed and high precision are desired. Electric Specifications (Tj=25℃) Parameters MD882 Min. Typical Max. Unit Output current 1.8 - 8.2 (5.86A RMS) Amps Supply voltage (DC) 24 68 90 VDC Logic signal current 7 10 16 mA Pulse input frequency 0 - 300 Khz Isolation resistance 500 - - MΩ Mechanical Specifications (Unit: mm, 1 inch=25.4 mm) Figure 1: Mechanical dimensions Pin Assignment and Description Control Signal Connector P1-pins Pin Function Details PUL﹢(+5V) Pulse signal: in single pulse (pulse/direction) mode, this input represents pulse signal, effective for each rising edge; 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) this input represents clockwise (CW) pulse. For reliable response, pulse width should be longer than 2.5μs. Series connect resistance for current-limiting when +12V or +24V used. PUL- (PUL) DIR+ (+5V) DIR signal: in single-pulse mode, this signal has low/high voltage levels, representing two directions of motor rotation; in double-pulse mode (set by inside jumpers J1&J2), this signal is counter-clock (CCW) pulse, effective on each rising edge. For reliable motion response, DIR signal should be ahead of PUL signal by 5μs at least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. DIR- (DIR) ENA+ (+5V) Enable signal: this signal is used for enabling/disabling the driver. High level for enabling the driver and low level for disabling the driver. Usually left unconnected (enabled). ENA- (ENA) Remark: Upward-rising edge effective is the default mode, and under-cover resistors R13 & R14 can be used to set effective in downward-falling edge; PUL/DIR is the default mode, and under-cover resistors R31 & R32 can be used to set to CW/CCW mode, namely double-pulse mode. Power connector P2 pins Pin Funtion Details Gnd DC power ground +V DC power supply, +24VDC － +90VDC, Including voltage fluctuation and EMF voltage. Phase A Motor coil A (leads A+ and A-) Phase B Motor coil B (leads B+ and B-) Microstep Resolution Selection Microstep resolution is specified by 5, 6, 7,8 DIP switches as shown in the following table: usteps/rev.( 1.8°/rev) SW5 SW6 SW7 SW8 400 ON ON ON ON 500 OFF ON ON ON 600 ON OFF ON ON 800 OFF OFF ON ON 1000 ON ON OFF ON 1200 OFF ON OFF ON 1600 ON OFF OFF ON 2000 OFF OFF OFF ON 2400 ON ON ON OFF 3200 OFF ON ON OFF 4000 ON OFF ON OFF 5000 OFF OFF ON OFF 6000 ON ON OFF OFF 6400 OFF ON OFF OFF 8000 ON OFF OFF OFF 10000 OFF OFF OFF OFF Current Setting Peak Current (A) RMS (A) SW1 SW2 SW3 1.8 1.29 OFF OFF OFF 2.70 1.93 ON OFF OFF 3.60 2.57 OFF ON OFF 4.60 3.29 ON ON OFF 5.50 3.93 OFF OFF ON 6.40 4.57 ON OFF ON 7.30 5.27 OFF ON ON 8.20 5.86 ON ON ON Typical Connections Figure 2: Connections to open-collector signal (common-anode) Figure 3: Connections to PNP signal (common-cathode) Download :            SD9082 User's Manual